package it.avantsoft.ls.ui;

import javax.swing.*;
import javax.swing.text.AttributeSet;
import javax.swing.text.SimpleAttributeSet;
import javax.swing.text.StyleConstants;
import javax.swing.text.StyleContext;
import java.awt.*;


public class ColorPane extends JTextPane {


    public void appendNaive(Color c, String s) { // naive implementation
        // bad: instiantiates a new AttributeSet object on each call
        SimpleAttributeSet aset = new SimpleAttributeSet();
        StyleConstants.setForeground(aset, c);

        int len = getText().length();
        setCaretPosition(len); // place caret at the end (with no selection)
        setCharacterAttributes(aset, false);
        replaceSelection(s); // there is no selection, so inserts at caret
    }

    public void append(Color c, String s) { // better implementation--uses StyleContext
        StyleContext sc = StyleContext.getDefaultStyleContext();
        AttributeSet aset = sc.addAttribute(SimpleAttributeSet.EMPTY,
                StyleConstants.Foreground, c);

        int len = getDocument().getLength(); // same value as getText().length();
        setCaretPosition(len);  // place caret at the end (with no selection)
        setCharacterAttributes(aset, false);
        replaceSelection(s); // there is no selection, so inserts at caret
    }

    public void append(String s) {
        int len = getDocument().getLength(); // same value as getText().length();
        setCaretPosition(len);  // place caret at the end (with no selection)
        replaceSelection(s); // there is no selection, so inserts at caret
    }


}